Do you have a question about the HP FS7600 and is the answer not in the manual?
Adjust the screen contrast to match your personal preference.
Adjusts the brightness to get the desired background level.
Fills the viewable area horizontally.
Shifts the image on the screen horizontally.
Fills the viewable area vertically.
Shifts the image on the screen vertically.
The image can be corrected for barrel distortion.